DEVELOPMENT OF STUDENT WORK SHEET TO IMPROVE HIGHER ORDER THINKING SKILLS ON CHEMICAL EQUILIBRIUM MATERIAL
This study aims to develop learning media for Student Worksheets (LKPD) using the Problem-Based Learning (PBL) model on chemical equilibrium material that is valid and effective. The research uses the 4D model R&D method, but the research steps carried out are only up to 3D, namely Define, Design, and Develop. The instruments used were non-test instruments in the form of validation sheets under BSNP standards and questionnaires for teacher and student responses to the developed LKPD. The results showed that the developed LKPD met the eligibility criteria according to the BSNP standards which were validated by the material expert validator and the media expert validator who is a Universitas Medan (UNIMED) chemistry lecturer by obtaining an average percentage score from the material expert validator of 82.69% with the "decent" criteria. and the average percentage of media expert validators is 94.63% with the criteria of "Very feasible". Meanwhile, based on the results of the teacher's response questionnaire to the designed LKPD, the average percentage result was 85.83% with the "High" criteria and the average percentage of student response questionnaires was 92% with the "Very Interested" criteria. So that the LKPD developed to improve higher-level thinking skills is appropriate for use in the chemistry learning process, especially in chemical equilibrium material.
Keywords: 4D, Development, Student Worksheets, Higher Order Thinking Skills, Thermochemical Topic